package com.nowcoder.community.service;

import com.nowcoder.community.dao.LoginTicketMapper;
import com.nowcoder.community.dao.UserMapper;
import com.nowcoder.community.entity.LoginTicket;
import com.nowcoder.community.entity.User;
import com.nowcoder.community.util.CommunityConstant;
import com.nowcoder.community.util.CommunityUtil;
import com.nowcoder.community.util.MailClient;
import org.apache.commons.lang3.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Service;
import org.thymeleaf.TemplateEngine;
import org.thymeleaf.context.Context;

import java.util.Date;
import java.util.HashMap;
import java.util.Map;
import java.util.Random;

@Service
public class UserService implements CommunityConstant {
    @Autowired
    private UserMapper userMapper;

    @Autowired
    private MailClient mailClient;

    @Autowired
    private TemplateEngine templateEngine;

    @Autowired
    private LoginTicketMapper loginTicketMapper;

    @Value("${community.path.domain}")
    private String domain;

    @Value("${server.servlet.context-path}")
    private String contextPath;

    public User findUserById(int id){
        return userMapper.selectById(id);
    }
    public Map<String,Object> register(User user){
        HashMap<String, Object> map = new HashMap<>();
        if(user==null){
            throw new IllegalArgumentException("参数不能为空");
        }
        if (StringUtils.isBlank(user.getUsername())){
            map.put("usernameMsg","用户名不能为空");
            return map;
        }
        if (StringUtils.isBlank(user.getPassword())){
            map.put("passwordMsg","密码不能为空");
            return map;
        }
        if (StringUtils.isBlank(user.getEmail())){
            map.put("emailMsg","邮箱不能为空");
            return map;
        }
        //验证账号是否存在
        User user1 = userMapper.selectByName(user.getUsername());
        if(user1!=null){
            map.put("usernameMsg","该账号已存在");
            return map;
        }
        //验证邮箱是否存在
        User user2 = userMapper.selectByEmail(user.getEmail());
        if(user2!=null){
            map.put("emailMsg","该邮箱已经被注册");
            return map;
        }
        //注册
        user.setSalt(CommunityUtil.generateUUID().substring(0,5));
        user.setPassword(CommunityUtil.md5(user.getPassword()+user.getSalt()));
        user.setType(0);
        user.setStatus(0);
        user.setActivationCode(CommunityUtil.generateUUID());
        user.setHeaderUrl(String.format("http://images.nowcoder.com/head/%dt.png",new Random().nextInt(1000)));
        user.setCreateTime(new Date());
        userMapper.insertUser(user);

        //激活邮件
        Context context = new Context();
        context.setVariable("email",user.getEmail());
        String url=domain+contextPath+"/activation/"+user.getId()+"/"+user.getActivationCode();
        context.setVariable("url",url);
        String content=templateEngine.process("/mail/activation",context);
        mailClient.sendMail(user.getEmail(),"请激活你的账号",content);

        return map;
    }
    //激活业务
    public int activation(int userId,String code){
        User user = userMapper.selectById(userId);
        if(user.getStatus()==1){
            return ACTIVATION_REPEAT;
        }else if(user.getActivationCode().equals(code)){
            //激活
            userMapper.updateStatus(userId,1);
            return ACTIVATION_SUCCESS;
        }else{
            return ACTIVATION_FAILURE;
        }

    }
    //登录
    public Map<String,Object> login(String username,String password,int expiredSeconds){
        HashMap<String, Object> map = new HashMap<>();
        //判断用户名是否为空
        if (StringUtils.isBlank(username)){
            map.put("usernameMsg","账号不能为空");
            return map;
        }
        //判断密码是否为空
        if(StringUtils.isBlank(password)){
            map.put("passwordMsg","密码不能为空");
            return map;
        }
        //验证账号是否存在
        User user = userMapper.selectByName(username);
        if(user==null){
            map.put("usernameMsg","该账号不存在");
            return map;
        }

        //验证账号是否激活
        if(user.getStatus()==0){
            map.put("usernameMsg","该账号未激活");
            return map;
        }

        //验证密码
        password =CommunityUtil.md5(password+user.getSalt());
        if(!user.getPassword().equals(password)){
            map.put("passwordMsg","密码错误");
            return map;
        }

        //生成登录凭证
        LoginTicket loginTicket = new LoginTicket();
        loginTicket.setUserId(user.getId());
        loginTicket.setTicket(CommunityUtil.generateUUID());
        loginTicket.setStatus(0);
        loginTicket.setExpired(new Date(System.currentTimeMillis()+expiredSeconds*1000));
        loginTicketMapper.insertLoginTicket(loginTicket);
        map.put("ticket",loginTicket.getTicket());

        return map;
    }
    public void logout(String ticket){
        loginTicketMapper.UpdateStatus(ticket,1);
    }
    public LoginTicket findLoginTicket(String ticket){
        return loginTicketMapper.selectLoginTicket(ticket);
    }
}
